See https://ci.chromium.org/p/flutter/builders/try/Windows%20custom_package_tests%20master%20-%20packages/229? The failure message says: ``` Could not find an option named "enable-windows-uwp-desktop". Run 'flutter -h' (or 'flutter <command> -h') for available flutter commands and options. ``` The flag is removed at https://github.com/flutter/flutter/commit/944fcda67f294981dfe2b57991c32afc724f34c2 We should just drop plugin and package tests running on UWP.